Headley, who works for the Serious Organised Crime Agency, spent the night drinking and eyeing up naked girls. He bragged about his undercover role, saying: “I’m a bit like James Bond, 007.” But he lost his rag when staff at The Queen Anne in Vauxhall, south London, put his bag behind the bar.

He stormed the serving area — grabbing and holding on to terrified barmaid Tina Courtney’s breasts. When an off-duty cop came over to calm Headley he tried to bite a chunk out of his chest and drew blood.

Earlier, Headley — whose work involves tracking down Britain’s biggest gangsters — tried to start a fight with customers over a game of pool.

Headley admitted assault at Inner London Crown Court and was fined £750. He faces a disciplinary investigation and is likely to be sacked.